Engine.



C. E. PRATT.

ENGINE.

APPLICATION HLED Nov. 22. 1915.

1,286, 189. Patented Nov. 26, 1918.

A. Y 2 SHEETS-SHEET l.

C. E. PRATT.

ENGINE. I APLCATION FILED NOV. 22.1915. 1,286,189. Patented Nov. 26, 1918.

2 SHEETS-SHEET 2.

sans nr ENGINE.

Specification of Letters ,'Patent.

PatentedNov. 26, 1918.

Application led November 22, 1915. Serial No. 62,692.

My invention relates to engines which employ governors. In practising my invention the engine governors are desirably located within the crank cases to be effectively lubricated by the oil which is dashed about in engine operation. y

In accordance with one feature of the invention, the governor is located on the crank pin side of the crank desirably by being suspended from the crank pin of the engine either directly or through the medium of a crank pin extension which constitutes a pivotal support for the governor. The invention also contemplates the use of an arm that constitutes a mounting for the stops between which the governor arm may oscillate and which stops serve to define the range of i operation of the governor.

In accordance with another feature of the invention the governor valve driving reach rod that connects the governor with the engine valve is also placed within the crank case where it may be eifectivelylubricated.

In accordance with another featureof the invention the bearing for the rocker arm is also inclosed within the engine case to adapt it for lubrication .which is also true of the.

portion of the rocker arm intervening between its mounting and the connectionof such arm with the reach rod.

I will explain my invention more fully by reference to the accompanying drawings showing the preferred embodiment thereof and in which Figure 1 is a side view partially in section of an engine equipped in accordance with the invention; Fig. 2 is a view on line 2 2 of Fig. l; and Fig. 3 is a view on line 3 3 of Fig. 1.

Like parts are indicated by similar characters of referencel throughout the different figures.

The engine shown is of a type vwhich is well known, a high speed self-oilingsteam engine. The base 1 of the engine supports and valve chest 4 while at whose rear end there is provided a bearing 5 in which the main engine shaft 6 is turned. The piston within the cylinder 3 has the usual piston rod 7 in connection with the crosshead 8, the crosshead having the usual connection with one end of a pitman 9 whose other end is-connected with a crank pin l0. This crank pin is mounted upon a crank 1l which is in fixed relation with the shaft, a balancing c0unterweight 12 being also attached to the arm. The counterweight is desirably in the form of a segment of a circle that is concentric with the shaft, this counterweight dipping within the oil 13 (or a mixture of oil and water) that is provided in the bottom of the crank case for the purpose of splashing the oil ,and casting it forwardly to oil the crosshead and other parts of the engine at the cylinder end thereofand to deposit oil upon the bearing 5, there being provision for returning the oil to the crank pit so that it may be used over and over again. The level of the oil is desirably sufficiently high to enable the outer end of the crank arm also to dip into the oil on each revolution of the engine shaft whereby the crank pin is thoroughly lubricated. Such systems of lubrication are well known to those familiar with the art.

A stop carrier 14; is in rigid relation to the crank arm and therefore rotates with the engine shaft. This stop carrier carries abutments 15 and 16 between which an end of an inertia bar 17 may oscillate, the position of the inertia bar regulating the operation of the steam valve to regulate the speed of the engine, as those who are familiar with the action of governors will understand. The inertia bar 1T is pivotally mounted at one side of its center of gravity upon a pin 18 which is located at the crank pin but is eccentric with respect thereto. A coiled spring 19 is anchored at one end to the stop carrier and at the other end to the inertia bar, this spring opposing the centrifugal action of the `inertia bar to enable the bar to be positioned to regulate the. actionof the steam valve. yThe valve rod 20 is pivotally connected with the upper end of a rocker arm 21 intermediately pivoted at 22 upon and within an enlargement of the engine case, the mounting for the rocker arm being positioned to be crank arm 11. The lower part of the rockery arm is pivotally connected with one end of the reach rod 23, the other end of this reach rod being pivotally connected with the inertia bar. By positioning the shaft or pin 18 eccentric tothe crank pin 10 l obtain advantageous lead conditions in that the shaft i or pin 18 is positioned 5 to 10 degrees ahead of the rotation of the center of the crank pin. The reach rod operates in a vertical plane parallel with the plane in which the pitman 9 operates. The reach rod and its connections wi'th the rocker arm and inertia bar are thus located within the engine case so as to be reached by the oil or other lubricant which is cast upwardly by the rotating parts within the crank case. It will be observed that the shaft driving crank is upon the inner end of the shaft that projects from one side of the crank, the crank pin being u'pon the opposite side of the cra-nk and carrying l the governor. By this arrangement the governor may operate across the inner endv of the shaft without interference from the shaft.

rlhe quantity of oil within the crank pit is also desirably su'flicient to enable the inertia bar itself to scatter or distribute the oil upon its own working parts as well as upon other moving parts of the engine. The engine case may be closed in any suitable manner, the case desirably including a hood portion 24 at the shaft end of the engine, this hood desirably being made comparatively light so that it may readily be removed and replaced, though its connection with the balance of the engine caseis of such a nature as to constitute a completely closed case from which the lubricant may not escape in the operation of the engine. By locating the governor on the crank pin side of the crank a straight bar inertia governor may be supported upon the crank whereas hitherto it was supported upon the fly wheel. rlhe invention, however, is not to be limited to the straight bar form of inertia governor as there are other advantages in the selected location of the governor such as simplicity of construction, improved accessibility and the closer approach of the governor to the center line of the engine.

Vhile I have herein shown andparticularly described the preferred embodiment of my invention I do not wish to be limited to the precise details of construction shown as changes may readily be made without departing from the spirit of my invention, but having thus described my invention I claim as new and desire to secure by Letters Patent the following 1. A steam engine including an engine shaft; a shaft driving crank a carrier upon which are provided two stops and which car? rier is mounted upon the crank to turn tlerewith; and a governor having a member whose range of movement is limited by said stops.

2. A steam engine including an engine shaft; a shaft driving crank; a carrier upon which are provided two stops and which carrier is mounted upon the crank to turn therewith; a governor having an inertia bar also mounted upon the crank; and a spring coupling said inertia bar with said carrier.

3. A steamy engine including a piston, a cross head coupled with the piston, a pitman, a crank coupled to the cross head by the pitman, an engine shaft coupled with the crank, a. lubricant container in which the cross head, pitman and crank move, and a governor mechanism also movable within the' lubricant container and operating as a splashing element yto distribute lubricant to other parts of the engine. p

4. A steam engine including a piston, a cross head coupled with thepiston, a pitman", a` crank coupled to the cross head by the pitman, an engine shaft coupled with the crank, a lubricant container in which the cross' head, pitman and crank move, and a governor mechanism carried by the crank also movable within the lubricant container vand operating as a splashing element to distribute the lubricant to other parts of the engine. y

5. A steam engine 'including a piston; a cross head coupled with the piston; a pitman; a crank coupled with the cross head bythe pitman; an engine shaft coupled with the crank; a case inclosingthe cross head, pitman and crank and in which case lubricant may be contained to be distributed in the case by the action of working parts therein; a governor' within the case and carried by the crank; a reach rod within the case and actuated and controlled by the governor with which the outer end of the reach rod is connected; a rocker arm connected at its lower end ywith the inner end of the reach rod and having its lower part within the aforesaid case; and a valve rod upon the exteriorl of the case and connected at its outer end with the upper end of the rocker arm that is also upon the exterior of the case.

6. A steam engine including a piston; a cross head coupled with the piston; a pitman; a crank coupled with the cross head by the pitman; an engine shaft coupled with the crank; a case inclosing the cross head, pitman and crank and in which case lubricant may be contained to be distributed in the case by the action of working parts therein; a governor within the case and carried bythe crank; a reach rod within the case' and actuated and controlled by the governor with which the outer end of the' reach r'o'd is connected; a rocker arm connected at its lower end with the innerend of the reach rod and having its lower part within 'the aforesaid case, the mounting for the rocker arm being also within the case to receivev lubricant; and a valve rod upon the exterior of the case and connected at its outer end With the upper' end of the rocker arm that is also upon the exterior of the case.

7 A steam engine including a piston, a cross head coupled With the piston, a pitman, a crank coupled with the cross head by the pitman, an engine shaft coupled with the crank, a case inclosing the cross head, pitlnan and crank, a governor Within the case and carried by the crank, a reach rod Within the case and actuated and controlled by the governor with which the outer end of the reach rod is connected, a rocker arm connected at its lower end With the inner end of the reach rod and having its lower part Within the aforesaid case, and a valve rod upon the exterior of the case and connected at its outer end with the upper end of the rocker arm that is also upon the exterior of the case.

8. A steam engine including a piston, a cross head coupled With the piston, a pitman, a crank coupled With the cross head by the pitman, an engine shaft coupled with the crank, a case inclosing the cross head, pitman and crank and in which case lubricant may be contained to be distributed in the case 'by the action of Working parts therein, a governor Within the case and carried by the crank, and a reach rod Within the case and actuated and controlled by the governor with which the outer end of the reach rod is connected.

9. A steam engine including a piston, a cross head coupled With the piston, a pitman, a crank coupled With the cross head by the pitman, an engine shaft coupled with the crank, a case inclosing the cross head,

pitman and crank, a governor Within the case and carried by the crank, and a reach rod Within the case and actuated and controlled by the governor with Which the outer end of the reach rod is connected.

10. A steam engine including an engine shaft, a shaft driving crank upon the inner end of the shaft and from one side of which crank said shaft projects, a crank pin projecting from the other side of the crank and operatively coupled with the piston of the engine, and a governor mounted upon the crank on the crank pin side thereof and operating across the adjacent end-of the shaft.

ll. A steam engine including an engine shaft, a shaft driving crank upon the inner end of the shaft and from one side of Which crank said shaft projects, a crank pin projecting from the other side of the crank and operatively coupled with the piston of the engine, and a governor mounted upon the crank pin and operating across the adjacent end of the shaft.

l2. A steam engine including an engine shaft, a crank associated with said shaft and including a crank pin, a shaft directly carried by said crank pin eccentric thereto, a valve mechanism, a governor, and a reach rod connected to said valve mechanism, said governor and reach rod having operative connection With said second shaft.

In Witness whereof, I hereunto subscribe my name this 16th day of November, A. D.

CLARENCE E. PRATT. Witnesses:

HENRY MENTZER, MARY L. DEE.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

